CN105198184A - Low-energy-consumption low-odor deep-dehydration method for sludge in sewage treatment plant - Google Patents
Low-energy-consumption low-odor deep-dehydration method for sludge in sewage treatment plant Download PDFInfo
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- CN105198184A CN105198184A CN201510000724.0A CN201510000724A CN105198184A CN 105198184 A CN105198184 A CN 105198184A CN 201510000724 A CN201510000724 A CN 201510000724A CN 105198184 A CN105198184 A CN 105198184A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
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Abstract
The invention discloses a kind of deep dehydration method for sludge of low energy consumption low odor, the technique is made of sludge feed system, high speed whirlwind drying system, blower system, exhaust collection transportation system, waste gas utilization system. Specific step is as follows:
Excess sludge to be processed collected by sludge feed system, it is broken after be delivered to high speed whirlwind drying system;
After sludge enters high speed whirlwind drying system, bulk sludge is decomposed first with high pressure gas, then, the sludge after being decomposed by high pressure gas is carried along into multiple-stage separator to and is taken away the moisture in sludge using the air that Wind Volume air blower generates, realize the desiccation of sludge;
Sludge after desiccation is discharged and is transported outward by the outlet at bottom of afterbody separator, and tail gas reaches waste gas utilization system via exhaust collection transportation system, is used for the oxygen supply of sewage treatment plant's biochemical system. This method uses air drying method, and stink is smaller, in addition, can effectively save the comprehensive energy consumption of sewage, Treatment of Sludge, and further decrease the discharge of foul smell by the utilization of tail gas.
Description
Technical field
The invention belongs to deeply dehydrating sludge field, be specifically related to a kind of sludge of sewage treatment plant deep dehydration method of less energy-consumption low odor.
Background technology
Along with the raising of the increase of China's town domestic sewage quantity discharged and sewage treatment capacity, wastewater treatment rate, the generation of mud also increases year by year.China's existing population more than 1,300,000,000, more than 640, city, urban population 2.7 hundred million.By in by the end of March, 2013, national urban wastewater treatment firm produces about 3,500 ten thousand tons, the mud of water ratio 80%.In recent years, sludge from wastewater treatment plant quantity discharged improves year by year.Expect the year two thousand twenty, sludge yield will reach 6,000 ten thousand tons ~ 9,000 ten thousand tons.Municipal sludge is the solid waste produced in sewage treatment process.Except containing a large amount of organism and the abundant nutritive substance such as nitrogen, phosphorus in mud, also there is the poisonous and harmful elements such as heavy metal, pathogenic bacterium and parasite.Due to the restriction to the horizontal awareness of sewage disposal, China disposes the process of mud and does not cause enough attention for a long time.The normal operation of the secondary pollution caused for preventing mud and guarantee sewage work and treatment effect, the position that the process handling problems of sewage sludge is occupied in municipal sewage treatment becomes increasingly conspicuous.
The target of municipal sewage sludge process and disposal is " minimizing, stabilization, innoxious, resource utilization ".Wherein, " minimizing " is the first step in municipal sewage sludge process and disposal process, is also a more crucial step.For the target of municipal sewage sludge " minimizing ", method relatively more conventional at present comprises: barrier film sheet frame filter-press dehydration, thermal hydrolysis-anaerobic technology, heat drying technology, electrodialysis dehydration technique etc.
Barrier film sheet frame filter-press dehydration has energy-conservation, efficient advantage, but in use often needs to add chemical agent and carry out chemical conditioning, not only increases sludge yield, also can bring impact to follow-up sludge disposal process; Thermal hydrolysis-anaerobic technology has can improve dehydration property, can improve follow-up anaerobic gas output, advantage that Digestive system can make denitrifying carbon source, but processing costs is high, it is complicated to run, and there is bad-smell problem; Sludge heat drying technology has that volume is little, efficiency is high, level of automation is high, the advantages such as labour intensity is little, but energy consumption is higher, and Partial key parts still need import.Electrodialytic technique sludge cake is entered osmosis drying equipment solid particulate and liquid does orientation movement under the effect of electric field, when by porosu solid filter membrane, solid grain size more very much not by, and water molecules can pass through, thus makes Solid-Liquid Separation.Its advantage is that dewatered sludge water ratio can be down to 40 ~ 60%, can effectively kill pathogenic bacteria, good operation stability, but cost is higher.
In addition, the technology utilizing high speed wind energy to carry out sludge drying is subject to paying close attention to more and more widely at present.Solidliquid mixture accelerates by this technology instantaneously, and the moisture realized in solidliquid mixture will be extruded out because of high velocity impact, and utilizes powerful shock shearing by solids fragmentation, thus can realize the high-efficiency dehydration of mud.This technology has the following advantages:
dehydration, without the need to adding chemical agent, is conducive to the follow-up disposal of mud;
mummification is effective, and moisture percentage in sewage sludge is after treatment minimum reaches less than 30%;
dehydration is carried out at normal temperatures, the stench phenomenon produced when avoiding pyroreaction;
compare the technology such as heat drying, energy consumption is lower.But this technology also exists following problem to be needed to solve:
a large amount of wind energy cannot be utilized, and causes energy to run off;
foul smell is together got rid of with tail gas, has certain environmental risk.
Summary of the invention
The object of the invention is to overcome prior art deficiency, and a kind of sludge of sewage treatment plant deep dehydration method of less energy-consumption low odor is provided.
Concrete technical scheme of the present invention is: a kind of deep dehydration method for sludge of less energy-consumption low odor, and technique is made up of mud feed system, high speed whirlwind dehumidification system, air-blast system, exhaust collection delivery system, waste gas utilization system.Concrete steps are as follows:
1) pending excess sludge is delivered to high speed whirlwind dehumidification system by after the collection of mud feed system, fragmentation.
2) after mud enters high speed whirlwind dehumidification system, first high pressure gas are utilized to be decomposed by bulk mud, then, the mud after being decomposed by high pressure gas carries and enters in stage separator and the moisture taken away in mud by the air utilizing Wind Volume gas blower to produce, and realizes the mummification of mud.
3) mud after mummification is discharged by the outlet at bottom of last step separator and is transported outward, and tail gas reaches waste gas utilization system via exhaust collection delivery system, uses for sewage work's biochemical system oxygen supply.
In above-mentioned exhaust collection delivery system, comprise transport pipe, check valve, flow control valve, flow monitoring instrument and bypass discharge leg system.
Above-mentioned waste gas utilization system, be placed in sewage work's aerobic biochemical unit, adopt the forms such as boring aeration pipe, microporous aeration disc (pipe), spiral-flow aeration dish, jet aerator, when tail gas blast meets the aerobic system depth of water, the one in boring aeration pipe, microporous aeration disc (pipe), spiral-flow aeration dish can be adopted; When tail gas blast is less than aerobic system hydraulic pressure, jet aerator form can be adopted.
In above-mentioned exhaust collection delivery system, when process after moisture percentage in sewage sludge≤30% and waste gas utilization system adopt adopt microporous aeration disc (pipe), spiral-flow aeration disk-form time, also should increase dust-removal system.
Above-mentioned bypass discharge leg system arranges when exhaust emissions amount is greater than Sewage Plant biochemical system oxygen requirement, comprises bypass duct, flow control valve and exhaust treatment system.
Beneficial effect:
1. energy-conservation.Utilize the air feed of tail gas as biochemical system of sludge treating system, the original blower fan airing system of sewage works can be substituted, avoid the loss of wind energy very in high degree, save the comprehensive energy consumption of mud, Sewage treatment systems;
2. low odor.First, the invention belongs to cryodrying technology, itself there is compared to traditional sludge high temperature drying technique the feature of low odor; Secondly, utilize the air feed of tail gas as biochemical system of sludge treating system, in tail gas, the odorous gas such as ammonia, alcohols and hydrocarbon compound will be dissolved in the water, and is removed by biochemical system degraded, and foul smell can be avoided to a great extent on the impact of surrounding enviroment.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1
With a treatment scale for 10000m
3the urban biology sewage work of/d is example, after the conventional sludge dehydration device process of Sewage Plant, produces the surplus sludge volume about 5 tons that water ratio is 80% every day.The excess sludge of water ratio 80% and sludge with low moisture content after process of the present invention are transported to sewage sludge storage bucket respectively by helix transporting device and after carrying out being uniformly mixed to reduce moisture percentage in sewage sludge, enter high speed whirlwind dehumidification system.The air compressor pump of 7bar pressure is provided with in high speed whirlwind dehumidification system front end, after the mud entering cyclone drying system is carried out destruction decomposition by its high pressure gas produced, enter in three grades of separators and carry out processed, at first step separator inlet, utilize tolerance=35m
3the air-flow that the gas blower of/min, blast=19.6kPa produces tangentially is entered by cylindrical separator, and mud is delivered to respectively first, second, third grade of separator, in course of conveying, air quantity takes away the moisture in mud, realize the mummification of mud, final dewatered sludge water ratio of discharging reaches about 40%.In third stage separator, the mud after dehydration is discharged by separator bottom, and part is backhauled and mixed with mud before treatment to front end, and the outward transport of remaining mud is disposed; Tail gas is discharged, because the aerobic oxygen requirement of sewage work is 35m by third stage separator top
3about/min, therefore without the need to arranging bypath system, simultaneously, Aerobic Pond available depth about 4m, tail gas blast is less than aerobic system hydraulic pressure, tail gas successively via flow control valve, vacuum breaker, orifice-plate flowmeter and the jet aerator being arranged in sewage work's Aerobic Pond inside, realizes recycling and the deodorizing process of tail gas by transport pipe.Because the dissolved oxygen of sewage work's aerobic system in the art all can be provided by sludge treatment tail gas, therefore can save for sewage work the Aeration fan that total power is about 55kW, and correspondingly reduce daily energy consumption.
Embodiment 2
With a treatment scale for 10000m
3the urban biology sewage work of/d is example, after the conventional sludge dehydration device process of Sewage Plant, produces the surplus sludge volume about 5 tons that water ratio is 80% every day.The excess sludge of water ratio 80% and sludge with low moisture content after process of the present invention are transported to sewage sludge storage bucket respectively by helix transporting device and after carrying out being uniformly mixed to reduce moisture percentage in sewage sludge, enter high speed whirlwind dehumidification system.The air compressor pump of 7bar pressure is provided with in high speed whirlwind dehumidification system front end, after the mud entering cyclone drying system is carried out destruction decomposition by its high pressure gas produced, enter in three grades of separators and carry out processed, at first step separator inlet, utilize tolerance=35m
3the air-flow that the gas blower of/min, blast=58.8kPa produces tangentially is entered by cylindrical separator, and mud is delivered to respectively first, second, third grade of separator, in course of conveying, air quantity takes away the moisture in mud, realize the mummification of mud, final dewatered sludge water ratio of discharging reaches about 40%.In third stage separator, the mud after dehydration is discharged by separator bottom, and part is backhauled and mixed with mud before treatment to front end, and the outward transport of remaining mud is disposed; Tail gas is discharged, because the aerobic oxygen requirement of sewage work is 35m by third stage separator top
3about/min, therefore without the need to arranging bypath system, simultaneously, Aerobic Pond available depth about 4m, tail gas blast is greater than pipeline crushing+aerobic system hydraulic pressure, tail gas successively via flow control valve, vacuum breaker, orifice-plate flowmeter and the micro-hole aerator being arranged in sewage work's Aerobic Pond inside, realizes recycling and the deodorizing process of tail gas by transport pipe.Because the dissolved oxygen of sewage work's aerobic system in the art all can be provided by sludge treatment tail gas, therefore can save for sewage work the Aeration fan that total power is about 55kW, and correspondingly reduce daily energy consumption.
Embodiment 3
With a treatment scale for 10000m
3the urban biology sewage work of/d is example, because entering organic matter of water relative concentration is higher, after the conventional sludge dehydration device process of Sewage Plant, produces the surplus sludge volume about 8 tons that water ratio is 80% every day.The excess sludge of water ratio 80% and sludge with low moisture content after process of the present invention are transported to sewage sludge storage bucket respectively by helix transporting device and after carrying out being uniformly mixed to reduce moisture percentage in sewage sludge, enter high speed whirlwind dehumidification system.The air compressor pump of 7bar pressure is provided with in high speed whirlwind dehumidification system front end, after the mud entering cyclone drying system is carried out destruction decomposition by its high pressure gas produced, enter in three grades of separators and carry out processed, at first step separator inlet, utilize tolerance=56m
3the air-flow that the gas blower of/min, blast=19.6kPa produces tangentially is entered by cylindrical separator, and mud is delivered to respectively first, second, third grade of separator, in course of conveying, air quantity takes away the moisture in mud, realize the mummification of mud, final dewatered sludge water ratio of discharging reaches about 40%.In third stage separator, the mud after dehydration is discharged by separator bottom, and part is backhauled and mixed with mud before treatment to front end, and the outward transport of remaining mud is disposed; Tail gas is discharged, because the aerobic oxygen requirement of sewage work is 35m by third stage separator top
3about/min, therefore needs to arrange bypath system, and meanwhile, Aerobic Pond available depth about 4m, tail gas blast is less than aerobic system hydraulic pressure, and tail gas is by transport pipe and discharge tube reuse and discharge respectively.Recycling tail gas, successively via flow control valve, vacuum breaker, orifice-plate flowmeter and the micro-hole aerator being arranged in sewage work's Aerobic Pond inside, realizes recycling and the deodorizing process of tail gas; The bypass discharge leg system that is emitted on of tail gas realizes, and discharges successively via flow control valve, spray+biological deodorizing device after removing stink.Because the dissolved oxygen of sewage work's aerobic system in the art all can be provided by sludge treatment tail gas, therefore can save corresponding Aeration fan (more than total power 55kW) for sewage work, and correspondingly reduce daily energy consumption.
Claims (5)
1. a sludge of sewage treatment plant deep dehydration method for less energy-consumption low odor, it is characterized in that technique is made up of mud feed system, high speed whirlwind dehumidification system, air-blast system, exhaust collection delivery system, waste gas utilization system, concrete steps are as follows:
1) excess sludge after the process of conventional sludge of sewage treatment plant dewatering unit is delivered to high speed whirlwind dehumidification system by after the collection of mud feed system, fragmentation;
2) after pending mud enters high speed whirlwind dehumidification system, first high pressure gas are utilized to be decomposed by bulk mud, then, mud after being decomposed by high pressure gas carries and enters in stage separator and the moisture taken away in mud by the air utilizing Wind Volume gas blower to produce, and realizes the mummification of mud;
3) mud after mummification is discharged by the outlet at bottom of last step separator and is transported outward, and tail gas reaches waste gas utilization system via exhaust collection delivery system, uses for sewage work's biochemical system oxygen supply.
2., in exhaust collection delivery system according to claim 1, comprise transport pipe, check valve, flow control valve, flow monitoring instrument and bypass discharge leg system.
3. waste gas utilization system according to claim 1, be placed in sewage work's aerobic biochemical unit, adopt the forms such as boring aeration pipe, microporous aeration disc (pipe), spiral-flow aeration dish, jet aerator, when tail gas blast meets the aerobic system depth of water, the one in boring aeration pipe, microporous aeration disc (pipe), spiral-flow aeration dish can be adopted; When tail gas blast is less than aerobic system hydraulic pressure, jet aerator form can be adopted.
4. in exhaust collection delivery system according to claim 1, when process after moisture percentage in sewage sludge≤30% and waste gas utilization system adopt adopt microporous aeration disc (pipe), spiral-flow aeration disk-form time, also should increase dust-removal system.
5. bypass discharge leg system according to claim 1 arranges when exhaust emissions amount is greater than Sewage Plant biochemical system oxygen requirement, comprises bypass duct, flow control valve and exhaust treatment system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510000724.0A CN105198184A (en) | 2015-01-04 | 2015-01-04 | Low-energy-consumption low-odor deep-dehydration method for sludge in sewage treatment plant |
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| CN201510000724.0A CN105198184A (en) | 2015-01-04 | 2015-01-04 | Low-energy-consumption low-odor deep-dehydration method for sludge in sewage treatment plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242209A (en) * | 2016-08-31 | 2016-12-21 | 海南兴能泰环境科技有限公司 | Municipal sewage and mud work in coordination with the method and device of circular treatment |
| CN107543903A (en) * | 2017-08-25 | 2018-01-05 | 北京林业大学 | A kind of method and apparatus for monitoring dewatering technology of mud ammonia and hydrogen sulfide on-line |
| CN108679957A (en) * | 2018-07-17 | 2018-10-19 | 北京中矿环保科技股份有限公司 | A kind of low temperature jet flow atomization coal slime drying process and system |
| CN111018294A (en) * | 2019-12-11 | 2020-04-17 | 苏州向达环境净化科技有限公司 | Circulating sludge drying system based on TSP host machine crushing treatment |
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| WO1998009122A1 (en) * | 1996-08-30 | 1998-03-05 | Cytech Systems, Inc. | Improved cyclonic dryer |
| US5915814A (en) * | 1996-08-30 | 1999-06-29 | Hydrofuser Technologies, Inc. | Cyclonic dryer |
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| CN203568956U (en) * | 2013-11-14 | 2014-04-30 | 明信德诚环境科技无锡有限公司 | Swirl high-speed jet sludge drier |
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2015
- 2015-01-04 CN CN201510000724.0A patent/CN105198184A/en active Pending
Patent Citations (5)
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| WO1998009122A1 (en) * | 1996-08-30 | 1998-03-05 | Cytech Systems, Inc. | Improved cyclonic dryer |
| US5915814A (en) * | 1996-08-30 | 1999-06-29 | Hydrofuser Technologies, Inc. | Cyclonic dryer |
| KR100759416B1 (en) * | 2007-05-25 | 2007-10-04 | 주식회사 한창엔텍 | Sludge drying device for shaftless spiralscrew |
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Non-Patent Citations (1)
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| 邹雪等: "《污水处理与应用》", 30 June 2009 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242209A (en) * | 2016-08-31 | 2016-12-21 | 海南兴能泰环境科技有限公司 | Municipal sewage and mud work in coordination with the method and device of circular treatment |
| CN107543903A (en) * | 2017-08-25 | 2018-01-05 | 北京林业大学 | A kind of method and apparatus for monitoring dewatering technology of mud ammonia and hydrogen sulfide on-line |
| CN108679957A (en) * | 2018-07-17 | 2018-10-19 | 北京中矿环保科技股份有限公司 | A kind of low temperature jet flow atomization coal slime drying process and system |
| CN111018294A (en) * | 2019-12-11 | 2020-04-17 | 苏州向达环境净化科技有限公司 | Circulating sludge drying system based on TSP host machine crushing treatment |
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